Weather will likely play an important role when you plan your trip to Oyin, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 28°C, while the coldest months are August and January, with an average of 25°C. The rainiest months in Oyin are September, August, July and June, with each month seeing an average of 254 mm of rainfall.